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diff --git a/include/ouroboros/hash.h b/include/ouroboros/hash.h
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+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Hashing functions
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef OUROBOROS_LIB_HASH_H
+#define OUROBOROS_LIB_HASH_H
+
+#include <ouroboros/sha3.h>
+#include <ouroboros/crc32.h>
+
+#define HASH_FMT "%02x%02x%02x%02x"
+#define HASH_VAL(hash) \
+ ((*(unsigned int *) hash) & 0xFF000000) >> 24, \
+ ((*(unsigned int *) hash) & 0x00FF0000) >> 16, \
+ ((*(unsigned int *) hash) & 0x0000FF00) >> 8, \
+ ((*(unsigned int *) hash) & 0x000000FF)
+
+/* FIXME: Implement specifying algorithm */
+void get_hash(uint8_t buf[],
+ const char * name);
+
+#endif /* OUROBOROS_LIB_HASH_H */